The recently approved version 2.2 refresh which has already hit the Marketplace is fixing the bug to align 4th & Mayor with the official Foursquare system and its changes. Additionally, the add place/venue bug has been fixed as well, friend requests are properly showing up in your profile more clearly and a link has been added to the About menu taking you to the official Foursquare application. Check the source link for the download or with your on-device Marketplace for an update notification.